What is MCP41010?

Hello guys! Nice to meet you! This is James Will. Today I would like to have a discussion on what the MCP41010 Potentiometer is with you. Briefly, MCP41010 is an integrated digital potentiometer produced by Microchip. It integrates a 10 kΩ digital potentiometer on a single chip. This article mainly introduces circuit, pinout, datasheet, and other detailed information about Microchip Technology MCP41010. 

1. Description

First of all, I want to tell you something about the potentiometer. A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. ... Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment. After understanding let us come to MCP41010.

MCP41010 is an integrated digital potentiometer produced by Microchip. It integrates a 10 kΩ digital potentiometer on a single chip. The wiper of the potentiometer has a total of 256 discrete adjustment nodes, and there is an 8 b E2PROM data register that directly controls the position of the wiper on the potentiometer. The user can write 8-bit words to the data register through corresponding instructions, and the adjustment accuracy can reach 256. The MCP41010 chip has an industry-standard SPI synchronous serial port, which can realize register operations to change the position of the sliding brush.

The wiper position of the MCP41010 varies linearly and is controlled via an industry-standard SPI interface. The devices consume <1 µA during static operation. A software shutdown feature is provided that disconnects the “A” terminal from the resistor stack and simultaneously connects the wiper to the “B” terminal. In addition, the dual During shutdown mode, the contents of the wiper register can be changed and the potentiometer returns from shutdown to the new value. The wiper is reset to the mid-scale position (80h) upon power-up. The RS (reset) pin implements a hardware reset and also returns the wiper to mid-scale.

2. Features

If you want to understand MCP41010 more deeply, it is especially essential to know its features.

• 256 Taps for Each Potentiometer

• Potentiometer Values for 10 kΩ, 50 kΩ and 100 kΩ

• Single and Dual Versions

• SPI™ Serial Interface (Mode 0,0 and 1,1)

• ±1 LSB Max INL & DNL

• Low Power CMOS Technology

• 1 µA Maximum Supply Current In Static Operation

• Multiple Devices Can Be Daisy-Chained Together (MCP42XXX Only)

• Shutdown Feature Open Circuits of All Resistors for Maximum Power Savings

• Hardware Shutdown Pin Available on MCP42XXX Only

• Single Supply Operation (2.7V - 5.5V)

• Industrial Temperature Range: -40°C to +85°C

• Extended Temperature Range: -40°C to +125°C

3. Pin Descriptions

(1) CS: Chip Select

(2) SCK: Serial Clock

(3) SI: Serial Data Input

(4) VSS: Ground

(5) PA0: Terminal A Connection For Pot 0

(6) PW0: Wiper Connection For Pot 0

(7) PB0: Terminal B Connection For Pot 0

(8) VDD: Power

4. Applications Information

The MCP41010 devices are 256 position single and dual digital potentiometers that can be used in place of standard mechanical pots. Resistance values of 10 kΩ, 50 kΩ and 100 kΩ are available. Each potentiometer is made up of a variable resistor and an 8-bit (256 position) data register that determines the wiper position. 

There is a nominal wiper resistance of 52Ω for the 10 kΩ version, 125Ω for the 50 kΩ and 100 kΩ versions. For the dual devices, the channel-to-channel matching variation is less than 1%. The resistance between the wiper and either of the resistor endpoints varies linearly according to the value stored in the data register. Code 00h effectively connects the wiper to the B terminal. At power-up, all data registers will automatically be loaded with the mid-scale value (80h). 

The serial interface provides the means for loading data into the shift register, which is then transferred to the data registers. The serial interface also provides the means to place individual potentiometers in the shutdown mode for maximum power savings. The SHDN pin can also be used to put all potentiometers in shutdown mode and the RS pin is provided to set all potentiometers to mid-scale(80h).

5. Applications

• Standard Mechanical Pots

• Nominal Wiper

• Data Registers

• Programmable Single-ended Amplifiers

• Programmable Differential Amplifiers

• Programmable Offset Trim

6. Manufacturer

Microchip Technology Inc.

In conclusion, the above is a detailed description of Potentiometer MCP41010. There is more content such as packaging, circuit diagrams, CAD model, etc., then you can jump to the page to continue learning. Thanks in advance dor you reading this article! Hope you have a wonderful day, sincerely!